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Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
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Related Experiment Video

Updated: Feb 23, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

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Selective Molecular Separation by Interfacially Crystallized Covalent Organic Framework Thin Films.

Kaushik Dey1,2, Manas Pal1, Kanhu Charan Rout3

  • 1Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory , Pune 411008, India.

Journal of the American Chemical Society
|September 7, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create thin films of covalent organic frameworks (COFs) using interfacial crystallization. These stable, porous COF films show high performance in solvent separation, overcoming previous processing limitations.

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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Covalent organic frameworks (COFs) exhibit desirable properties due to their modular design.
  • Current synthesis methods yield insoluble COF powders, limiting practical applications.

Purpose of the Study:

  • To develop an accessible method for fabricating processable COF materials.
  • To create large-scale, free-standing COF thin films with tunable thickness.

Main Methods:

  • Employed a bottom-up interfacial crystallization strategy at a liquid-liquid interface.
  • Controlled simultaneous crystallization and morphology of COF structures.
  • Grew free-standing thin films transferable to various substrates.

Main Results:

  • Fabricated porous, crystalline COF thin films with high chemical and thermal stability.
  • Achieved tunable film thicknesses down to sub-100 nm.
  • Demonstrated exceptional solvent-permeance and solute-rejection, with Tp-Bpy films showing high acetonitrile permeance (339 L m⁻² h⁻¹ bar⁻¹).

Conclusions:

  • The interfacial crystallization method enables the scalable production of processable COF thin films.
  • These nanostructured COF films offer significant potential for separation technologies.